4.7 Article

Genetic and Management Effects on Barley Yield and Phenology in the Mediterranean Basin

Journal

FRONTIERS IN PLANT SCIENCE
Volume 12, Issue -, Pages -

Publisher

FRONTIERS MEDIA SA
DOI: 10.3389/fpls.2021.655406

Keywords

crop model; barley; genotype; management; Mediterranean

Categories

Funding

  1. European Union-INCO-MED Program [ICA3-CT2002-10026]

Ask authors/readers for more resources

Heading time in barley is a key developmental stage controlling adaptation to the environment, influenced by agronomy and genetics. The study highlights the importance of optimal genotype/sowing date combinations in escaping extreme weather events and maximizing grain yield in the Mediterranean basin. Breeding activities should focus on allelic combinations with recessive VRN-H2 and EPS2 genes to minimize heat stress risks and maintain high yields.
Heading time in barley is considered a key developmental stage controlling adaptation to the environment and it affects grain yield; with the combination of agronomy (planting dates) and genetics being some of the determinants of adaptation to environmental conditions in order to escape late frost, heat, and terminal drought stresses. The objectives of this study are (i) to apply a gene-based characterization of 118 barley doubled haploid recombinants for vernalization, photoperiod, and earliness per se; (ii) use such information to quantify the optimal combination of genotype/sowing date that escapes extreme weather events; and (iii) how water and nitrogen management impact on grain yield. The doubled haploid barley genotypes with different allelic combinations for vernalization, photoperiod, and earliness per se were grown in eight locations across the Mediterranean basin. This information was linked with the crop growth model parameters. The photoperiod and earliness per se alleles modify the length of the phenological cycle, and this is more evident in combination with the recessive allele of the vernalization gene VRN-H2. In hot environments such as Algeria, Syria, and Jordan, early sowing dates (October 30 and December15) would be chosen to minimize the risk of exposing barley to heat stress. To maintain higher yields in the Mediterranean basin, barley breeding activities should focus on allelic combinations that have recessive VRN-H2 and EPS2 genes, since the risk of cold stress is much lower than the one represented by heat stress.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available